removed coverity

.travis.yml

@@ -3,19 +3,3 @@ compiler:
   - gcc
   - clang
 script: make
-
-env:
-  global:
-   # The next declaration is the encrypted COVERITY_SCAN_TOKEN, created
-   #   via the "travis encrypt" command using the project repo's public key
-   - secure: "iZ1KIL71+t+XHQOaOkuRDDvtUoQtvMciKI+U8u9r20dz1C+sdlMNt39e0NBvfA5iLj2mo9QaTVNsf31OucfmykSkbB7adFWsYx/11BdVd2t2PYjb3n07GJjDSodfo/8l3rrglkcB8ewYK37JImvRBQuJVn6MmpU32eZweo73c5o="
-
-addons:
-  coverity_scan:
-    project:
-      name: "lh3/bwa"
-      description: "Build submitted via Travis CI"
-    notification_email: lh3@me.com
-    build_command_prepend: "make clean"
-    build_command:   "make"
-    branch_pattern: dev